The practice of applying a new coat of paint over an existing oil-based finish without abrading the surface focuses on promoting adhesion through chemical bonding rather than mechanical keying. It involves using specific primer products formulated to adhere to glossy, oil-based surfaces and provide a receptive base for subsequent layers of latex or acrylic paint. This technique contrasts with traditional methods which necessitate sanding to create a rough profile for the new paint to grip.
Eliminating the sanding process saves time and labor, reduces dust generation, and is particularly valuable when dealing with lead-based paint where disturbance should be minimized. Historically, sanding was the only recognized method for ensuring proper adhesion, however, advancements in paint chemistry have led to the development of primers capable of creating a strong bond to previously difficult surfaces. This evolution offers a more efficient and safer alternative for surface preparation in painting projects.
